Heads up, WB.
The answer IS a portmanteau
That's what "makes" the rebus.
And, as far as the answer being "too long", I guess there are a couple of options necessary, here, to call to your attention, also.
So, "heads up", again.
01. Editors are capable (and so empowered) to reduce the amount of verbiage anywhere on this website. Apparently they considered this answer OK in this regard. So, let's let them do their work unfettered.
02. You are certainly welcomed to stop reading any time your attention span so dictates. If you choose to not learn something about the use of literary devices such as "nonce" words and "portemanteau" derivatives, that is certainly your privilege.
Thank you for your visit and your comments. Come any time.
:roll: :roll:

Hi, TT -
Send me a personal message with any specific questions you might have and I'll do my best to answer.
Just click my name (to the left here) and then look to the far right on the next window you get and you should see "send message".
Thanks for your visit and your comments.
BB02 :)